Lifting jack



FIG. 1 is a perspective view taken from the rear and one side of alifting jack showing my new design in raised condition;

FIG. 2 is a perspective view taken from the front and opposite sidethereof; and

FIG. 3 is a perspective view thereof similar to that of FIG. 1 but inlowered condition.

The ornamental design for a lifting jack, substantially as shown anddescribed.